Rocking and dumping grate.



' PATENTED SEPT. 24, 1907. P. L. GROWE & A. PRANKENHEIM.

ROCKING AND DUMPING GRATE.

APPLIOATIOK FILED APR.6,1906:

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PATENTED SEPT. 24, 1907. P. GROWE & A. FRANKENHEIM. ROCKING AND DUMPING GRATE.

APPLIUATIOK FILED APB-6.1906.

/W W WWI-V W" l L/ a) UNITED STATES PATENT OFFICE PAUL L. OROWE, OF JERSEY CITY, NEW JERSEY, AND AARON FRANKENHEIM, OF NEW YORK, N. Y.; SAID FRANKENHEIM ASSIGNOR TO SAID OROWE.

ROCKING'AND DUMBING GRATE.

Specification of Letters Patent.

Patented Sept. 24, 1907,

1 Application filed April 6, 1906. Serial No. 310,358.

To all whom it may concern:

Be it known that we, PAUL L. Gnown, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, and AARON FRANK- ENIIEIM, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Rocking and Dumping Grates; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in rocking and dumping grates, and has for its object the provision of means for facilitating combustion and also the minimizing of the cost of construction of a grate.

With this and other objects in view, the invention consists of certain novel constructions, combinations, and arrangements of parts, as will be hereinafter fully described andclaimed.

In the drawings:Figure 1 is a top plan view of a range grate constructed in accordance with the present invention and showing the frame in section. Fig. 2 is a top plan view of the grate frame'constructed similar to Fig. 1. Fig. 3 is a view in side elevation of one of the grate bars depicted in Fig. 1. Fig. 4 is a transverse, sectional view of a stove grate constructed in accordance with one form of the present invention. Fig. 5 is a top plan view of one half of a circular grate. Fig. 6 is a view in side elevation of the ends of the grate bars depicted in Fig. 5, broken away to show their connection to the grate frame. Fig. 7 is a fragmentary view of another embodiment of the present invention. Fig. 8 is a view taken on line 88, Fig. 7, looking in the direction of the arrow. Fig. 9 is a view in side elevation of the actuating shaft, and showing a truss attached thereto. Fig. 10 is a view in side elevation of one of the grate bars showing means whereby the same is supported upon the frame. Fig. 11 is a fragmentary view of a grate frame composed of structural material. Fig. 12 is a fragmentary view of another or end portion of the frame part of which is depicted in Fig. 11.

Referring to the drawings by numerals, 1 designates a frame which may be of any approved form, and 2 the rocking grate bars carried thereby. The frame 1 is provided at its sides with teeth or fingers 3, the employment of which results in the formation of recesses 4, in which are positioned the laterally extending teeth 5 of the rocking grate bars 2. In the present instance, I have shown three rocking bars, although, of course, any number may be employed, if desired, by increasing the size of the grate frame and the other cooperating parts. The frame 1 may be dumped for it is supported upon the diametrically opposite extensions or stub shafts 6 and 6 journaled upon suitable supports, thereby permitting the grate frame to be turned sufficiently for dumping the same. Within the hollow extension of stub shaft 6, a rocking arm 7 is journaled. The outer end of the arm 7 is squared while the inner end is bifurcated, as at 8, for the reception of one of the grate bars which it supports.

Secured within and to each end of frame 1 is a supporting member 9. This member 9 is provided with a horizontal extension, which extension is notched or cut out, as at 10.

By referring to Fig. 3, the mode of assembling the bars with the grate frame will be better understood, as each bar 2 at each end is provided with a horizontal notch 11, which is adapted to engage one of the notched portions 10 of the supporting member 9. One notched end of the bar 2 is first inserted in one of the notches 10 and then the bar' is dropped upon the opposite supporting member 9 of the frame, Figs. 3 and 10. The extension 12 of the bar in each instance rests upon the horizontal ledge of the supporting member, while the notched portion 10 prevents any lateral displacement of the bar. Each bar is also provided with an aperture 13, elongated transversely of the bar. Within the apertures 13 the connecting link or member 14 is positioned, which member 14 is clearly seen in Figs. 4 and 5.

The connecting link or member 14 is provided with notches 15, Fig. 4, which notches are adapted to engage the lower portions of the elongated apertures 13. After the connecting link or member 14 has been positioned within the apertures 13 of the bars 2, a spring cotter 16 is inserted in one of the apertures and extends longitudinally with the connecting link 14, Fig. 4. This cotter 16 prevents the connecting member 14 from being displaced after it has been positioned within the apertures. Cotter pins 17 are positioned Within the webs 18 of some of the bars below the horizontal ledge or supporting member for preventing the rocking bars from working out of position. i

In Fig. 4, the frame is shown as being slightly curved transversely. This type is preferably employed in a stove and not a boiler, although, of course, it may be employed for any purpose desired. The general structure is similar to the structure depicted in Figs. 1 and 2.

In Fig. 5 is shown onehalf of a circular boiler grate similar to the embodiments depicted in Figs. 1 and 4. The rocking grate bars 2 are employed and notched at the ends similarly to the bar depicted in Fig. 3. The frame of this embodiment is substantially the same as the frame depicted in Figs. 1 and 2, and the means for synchronously rocking all of the bars is also similar. In this embodiment, a stub shaft 6 is the equivalent of stub shaft 6 in Fig. 1, and the actuating member 7 is journaled in the hollow stub shaft 6, and is connected.

to one of the rocking bars the same as in the other embodiments. The web of one of the bars is positioned between the bifurcated portion 8 of the rocking arm 7 and when rotary movement is imparted to said arm, a similar movement will also be imparted to all of the grates by reason of the fact that they are connected by the link or connecting member 14.

In Fig. 6, the supporting rib or ledge 9' is formed integral with the frame 1. Each bar is preferably apertured as at 20, for receiving the spring cotter 17 for preventing the bar from becoming displaced, the bars having the apertures at each end permitting the bar to be placed in the frame end for end the teeth of the bar at its surface matching the teeth of a contiguous bar whether placed in position on the right or left side, the bars being interchangeable both as to position in the frame and relation to each other.

In Fig. 9, we have shown a rocking shaft 7 which is preferably employed for large or long grate surfaces. A truss is secured to the rocking shaft 7 a by any suitable fastening means, as for instance, bolts 22. A spacing plate 23 is interposed between the truss and shaft intermediate the ends of said truss 21. The member 7 is squared upon one end as at 24. The truss 21 is provided with a depending portion 25 at each end and with curved flanges embracing the shaft 7. These flanges 26 materially increase the stability of the truss 21 and the depending extensions 25 are normally seated within a notched or cut-out portion 27 of a connecting link member 28, Figs. 7 and 8. the application of the member 28 at each end of the grate bar, as shown in Fig. 3.

In Fig. 7, we have shown a modification of the truss 21. In this instance, the member 29 is provided with the flanges 26 and the depending extension 25. The extension 25 is seated in a notched or cut-out portion of V the connecting link or member 28, and when said member 28 is reciprocated, rocking movement will be imparted to the bars 2.

In wide grate surfaces it is preferable to employ a keyplate 30 instead of a spring cotter 16 for securing the connecting link or member 28 within the elongated apertures 13 of the grate bars. A spiing cotter 31 is positioned transversely of the key-plate 30 and the connecting link or member 28 for securing said members together and thereby preventing the key-plate from working out of position.

In Fig. 8, the link or member 28 is shown with a depending portion 32 in which is formed a notch 27. This depending portion is necessary by reason of the depend ing extension 25 formed upon the rocking shaft 21.

In Fig. 7, the extensions 12 of the grate bars rest upon a horizontal ledge or portion 33 of a beam which is substantially L-shaped in cross section. The beam employed for constructing the grate frame is formed preferably of structural steel.

In Figs. 11 and 12, I have illustrated a fragmentary view of a structural steel frame, in which the supporting member 34, carrying the ledge 33 is secured by any suitable means to a beam 35. The ledge 33 is provided with the notches or cut-out portions 10 and the beam 35 is provided with a bifurcated end 36 and with apertures 37. Within the apertures 37, a vertical bolt is adapted to be positioned, after the tenon 38, Fig. 11, has been positioned within the bifurcated portion of beam 35.

Thus the truss permits of The tenon 38 is formed upon a beam 39, which beam is substantially L-shaped in cross-section. In this instance, the stationary fingers 3 are integral with the plate or beam 40, which beam 40 is fixedly secured to the vertical portion of the L-shaped beam 39. The frame portions being more rigidly held in position by the application of a bolt through the apertures 37 It is to be understood that the structure in Figs. 11 and 12 shows a frame for large grate surfaces, which frame is made up of parts, preferably of structural steel, although, of course, we do not limit ourselves to this specific material, as any other metal may be employed. In this embodiment, the bar 40 and the fingers 3 are in structure substantially similar to one-half of any of the rocking bars.

In the structure depicted in Fig. 1, the fingers 3 are cast upon the grate frame and are not formed upon a portion which is substantially attached to the frame after it has been cast.

The same principle of structure is followed in all of our embodiments and necessarily the mode of operating the bars and dumping the grate is substantially the same. We have shown a rocking arm, which is connected directly to the web of one of the bars, through the medium of a connecting link and member whereby movement is synchronously imparted to all of the bars when the rocking arm is actuated by the operator. The positioning of each bar within the frame is quickly accomplished by reason of the peculiar structure thereof. One end of a bar is first inserted in the notched portion of the horizontal supporting ledge and then the opposite end of the bar is lowered and permitted to rest upon the opposite supporting ledge. The spring cotters are then inserted and positioned as heretofore stated, thus permitting turning the grate frame upside down without the displacement of the grate bars, the construction of the grate bars being such that they are interchangeable and work perfectly together, whether made of cast, or structural material. V

The grate bars are constructed with a curved surface 41, on its upper face and with this curved surface constitutes a standard grate bar for use in all grate surfaces upon which coal is consumed embodying preferably rocking and dumping grates.

What we claim is within the bifurcated portion of said rocking arm, a grate bar seated at both ends within notched portions of said supporting members and means connecting the bars intermediate their ends.

2. In a device of the character described, the combination with a grate frame, of horizontal supporting members carried by said frame, rocking bars carried by said sup porting member, a rocking arm provided with avertical slot journaled in said frame, a bar positioned upon one of said supporting members at one end and at its opposite end within the slot of said rocking arm, and a connecting member extending through said bars.

3. In a device of the character described, the combination with a frame, of rocking bars carried by said frame, each of said bars provided with a transverse, elongated aperture, a connecting member positioned within the apertured portions of said bars, said connecting member provided with notches formed upon its lower edge, the notched portions of said connecting member engaging the bottom surface of the apertures of said bars, fastening means for securing said connecting member upon said bars, and means for rocking said bars.

4. In a device of the character described, the COUlbiIliL tion with a support, of rocking bars carried by said support, each bar provided with a depending longitudinally extending Web, connecting members secured transversely of and normally in engagement with the webs of said bars, fastening means extending transversely of the webs and securing the connecting members in en Y g'ement with said web, and means for synchronously rocking said bars.

5. In a dey'ice of the character described, the combination with a support, of rocking bars carried by said support, each bar provided with a web and with a transverse aperture formed in said web, a connecting member positioned within the apertures of said webs, a key positioned Within an aperture of one of said webs and in engagement with said connecting member, and means for synchronously rocking all of said bars.

0. In a device of the character described, the combination with a support, rocking bars carried by said support, of a rocking shaft carried by said support, a member provided with a depending portion, in engagement with said shaft. said member provided with transversely curved flanges, fastening means fixedly securing said member to said shaft, and means connecting said bars and in engagement with said depending portion of the member.

7. In a device of the character described, the combination with a support, of a rocking shaft carried by said support, a strengthening member in engagement with said shaft, spacing means positioned between said shaft and strengthening member intermediate their ends, fastening means fixedly securing said strengthening member to said shaft, a rocking bar carried by said support, and means connecting said strengthening members and rocking bar.

In testimony whereof we aflix our signatures in presence of two witnesses.

PAUL L. CROWE. AARON FRANKENHEIM. Witnesses ALBnnr FAI-INER, Hn mlm L. SCIIMEDES. 

